Dear Future Self,
Don’t give up on your dreams. This will be the most difficult time in your life. You have worked hard to be successful, but you feel cheated as you are locked in a psychiatric ward with bars on the windows and a stainless steel bathroom. But everything will work out.
You will have to go through a few doctors and side effects, but a medication cocktail will be found for you. The suicidal ideation will go away.